Mercurial > hg > blitz_condensed
annotate src/com/go/trove/net/CheckedSocket.java @ 0:3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
author | Dan Creswell <dan.creswell@gmail.com> |
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date | Sat, 21 Mar 2009 11:00:06 +0000 |
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1 /* ==================================================================== |
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2 * Trove - Copyright (c) 1997-2000 Walt Disney Internet Group |
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3 * ==================================================================== |
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4 * The Tea Software License, Version 1.1 |
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5 * |
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6 * Copyright (c) 2000 Walt Disney Internet Group. All rights reserved. |
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7 * |
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8 * Redistribution and use in source and binary forms, with or without |
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9 * modification, are permitted provided that the following conditions |
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10 * are met: |
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11 * |
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12 * 1. Redistributions of source code must retain the above copyright |
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13 * notice, this list of conditions and the following disclaimer. |
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14 * |
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15 * 2. Redistributions in binary form must reproduce the above copyright |
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16 * notice, this list of conditions and the following disclaimer in |
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17 * the documentation and/or other materials provided with the |
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18 * distribution. |
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19 * |
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20 * 3. The end-user documentation included with the redistribution, |
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21 * if any, must include the following acknowledgment: |
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22 * "This product includes software developed by the |
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23 * Walt Disney Internet Group (http://opensource.go.com/)." |
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24 * Alternately, this acknowledgment may appear in the software itself, |
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25 * if and wherever such third-party acknowledgments normally appear. |
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26 * |
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27 * 4. The names "Tea", "TeaServlet", "Kettle", "Trove" and "BeanDoc" must |
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28 * not be used to endorse or promote products derived from this |
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29 * software without prior written permission. For written |
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30 * permission, please contact opensource@dig.com. |
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31 * |
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32 * 5. Products derived from this software may not be called "Tea", |
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33 * "TeaServlet", "Kettle" or "Trove", nor may "Tea", "TeaServlet", |
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34 * "Kettle", "Trove" or "BeanDoc" appear in their name, without prior |
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35 * written permission of the Walt Disney Internet Group. |
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36 * |
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37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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40 * DISCLAIMED. IN NO EVENT SHALL THE WALT DISNEY INTERNET GROUP OR ITS |
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41 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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42 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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43 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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44 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
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45 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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46 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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47 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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48 * ==================================================================== |
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49 * |
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50 * For more information about Tea, please see http://opensource.go.com/. |
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51 */ |
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52 |
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53 package com.go.trove.net; |
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54 |
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55 import java.io.*; |
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56 import java.net.*; |
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57 import java.util.*; |
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58 |
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59 /****************************************************************************** |
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60 * A socket that tracks if any I/O exceptions have occured and ensures that |
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61 * plain I/O exceptions are thrown as SocketExceptions. InterruptedIOExceptions |
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62 * do not affect the exception count, and they are not converted to |
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63 * SocketExceptions. |
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64 * <p> |
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65 * All socket exceptions thrown will actually be instances of |
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66 * {@link CheckedSocketException}, which subclasses SocketException. The error |
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67 * messages will contain additional information, and the original exception |
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68 * and socket can be obtained from it. |
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69 * |
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70 * @author Brian S O'Neill |
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71 * @version |
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72 * <!--$$Revision: 1.1 $-->, <!--$$JustDate:--> 01/03/16 <!-- $--> |
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73 */ |
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74 public class CheckedSocket extends FilteredSocket { |
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75 /** |
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76 * Returns a new CheckedSocket instance only if the given socket isn't |
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77 * already one. |
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78 */ |
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79 public static CheckedSocket check(Socket socket) throws SocketException { |
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80 if (socket instanceof CheckedSocket) { |
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81 return (CheckedSocket)socket; |
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82 } |
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83 else { |
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84 return new CheckedSocket(socket); |
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85 } |
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86 } |
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87 |
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88 private int mExceptionCount; |
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89 private InputStream mIn; |
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90 private OutputStream mOut; |
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91 |
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92 private Set mExceptionListeners; |
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93 |
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94 protected CheckedSocket(Socket socket) throws SocketException { |
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95 super(socket); |
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96 } |
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97 |
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98 /** |
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99 * Returns the total number of exceptions encountered while using this |
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100 * socket, excluding InterruptedIOExceptions. If this count is not zero, |
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101 * then the socket is potentially in an unrecoverable state. |
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102 */ |
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103 public int getExceptionCount() { |
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104 return mExceptionCount; |
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105 } |
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106 |
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107 /** |
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108 * Internally, the collection of listeners is saved in a set so that |
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109 * listener instances may be added multiple times without harm. |
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110 */ |
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111 public synchronized void addExceptionListener(ExceptionListener listener) { |
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112 if (mExceptionListeners == null) { |
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113 mExceptionListeners = new HashSet(); |
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114 } |
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115 mExceptionListeners.add(listener); |
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116 } |
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117 |
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118 public synchronized void removeExceptionListener(ExceptionListener listener) { |
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119 if (mExceptionListeners != null) { |
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120 mExceptionListeners.remove(listener); |
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121 } |
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122 } |
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123 |
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124 public synchronized InputStream getInputStream() throws IOException { |
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125 if (mIn != null) { |
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126 return mIn; |
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127 } |
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128 |
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129 try { |
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130 return mIn = new Input(super.getInputStream()); |
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131 } |
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132 catch (Exception e) { |
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133 throw handleIOException(e); |
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134 } |
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135 } |
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136 |
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137 public synchronized OutputStream getOutputStream() throws IOException { |
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138 if (mOut != null) { |
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139 return mOut; |
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140 } |
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141 |
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142 try { |
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143 return mOut = new Output(super.getOutputStream()); |
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144 } |
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145 catch (Exception e) { |
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146 throw handleIOException(e); |
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147 } |
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148 } |
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149 |
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150 public void setTcpNoDelay(boolean on) throws SocketException { |
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151 try { |
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152 super.setTcpNoDelay(on); |
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153 } |
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154 catch (Exception e) { |
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155 throw handleSocketException(e); |
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156 } |
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157 } |
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158 |
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159 public boolean getTcpNoDelay() throws SocketException { |
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160 try { |
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161 return super.getTcpNoDelay(); |
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162 } |
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163 catch (Exception e) { |
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164 throw handleSocketException(e); |
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165 } |
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166 } |
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167 |
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168 public void setSoLinger(boolean on, int linger) throws SocketException { |
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169 try { |
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170 super.setSoLinger(on, linger); |
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171 } |
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172 catch (Exception e) { |
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173 throw handleSocketException(e); |
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174 } |
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175 } |
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176 |
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177 public int getSoLinger() throws SocketException { |
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178 try { |
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179 return super.getSoLinger(); |
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180 } |
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181 catch (Exception e) { |
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182 throw handleSocketException(e); |
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183 } |
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184 } |
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185 |
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186 public void setSoTimeout(int timeout) throws SocketException { |
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187 try { |
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188 super.setSoTimeout(timeout); |
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189 } |
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190 catch (Exception e) { |
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191 throw handleSocketException(e); |
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192 } |
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193 } |
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194 |
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195 public int getSoTimeout() throws SocketException { |
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196 try { |
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197 return super.getSoTimeout(); |
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198 } |
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199 catch (Exception e) { |
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200 throw handleSocketException(e); |
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201 } |
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202 } |
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203 |
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204 public void setSendBufferSize(int size) throws SocketException { |
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205 try { |
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206 super.setSendBufferSize(size); |
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207 } |
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208 catch (Exception e) { |
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209 throw handleSocketException(e); |
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210 } |
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211 } |
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212 |
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213 public int getSendBufferSize() throws SocketException { |
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214 try { |
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215 return super.getSendBufferSize(); |
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216 } |
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217 catch (Exception e) { |
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218 throw handleSocketException(e); |
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219 } |
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220 } |
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221 |
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222 public void setReceiveBufferSize(int size) throws SocketException { |
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223 try { |
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224 super.setReceiveBufferSize(size); |
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225 } |
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226 catch (Exception e) { |
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227 throw handleSocketException(e); |
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228 } |
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229 } |
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230 |
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231 public int getReceiveBufferSize() throws SocketException { |
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232 try { |
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233 return super.getReceiveBufferSize(); |
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234 } |
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235 catch (Exception e) { |
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236 throw handleSocketException(e); |
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237 } |
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238 } |
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239 |
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240 public void close() throws IOException { |
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241 try { |
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242 super.close(); |
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243 } |
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244 catch (Exception e) { |
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245 throw handleIOException(e); |
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246 } |
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247 } |
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248 |
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249 public void setKeepAlive(boolean on) throws SocketException { |
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250 try { |
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251 super.setKeepAlive(on); |
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252 } |
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253 catch (Exception e) { |
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254 throw handleSocketException(e); |
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255 } |
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256 } |
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257 |
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258 public boolean getKeepAlive() throws SocketException { |
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259 try { |
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260 return super.getKeepAlive(); |
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261 } |
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262 catch (Exception e) { |
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263 throw handleSocketException(e); |
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264 } |
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265 } |
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266 |
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267 public void shutdownInput() throws IOException { |
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268 try { |
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269 super.shutdownInput(); |
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270 } |
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271 catch (Exception e) { |
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272 throw handleIOException(e); |
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273 } |
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274 } |
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275 |
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276 public void shutdownOutput() throws IOException { |
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277 try { |
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278 super.shutdownOutput(); |
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279 } |
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280 catch (Exception e) { |
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281 throw handleIOException(e); |
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282 } |
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283 } |
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284 |
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285 /** |
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286 * @param e should be instance of IOException or RuntimeException. |
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287 */ |
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288 IOException handleIOException(Exception e) { |
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289 if (e instanceof InterruptedIOException) { |
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290 return CheckedInterruptedIOException.create |
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291 ((InterruptedIOException)e, mSocket); |
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292 } |
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293 |
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294 int count; |
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295 synchronized (this) { |
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296 count = ++mExceptionCount; |
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297 } |
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298 exceptionOccurred(e, count); |
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299 |
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300 if (e instanceof CheckedSocketException) { |
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301 return (CheckedSocketException)e; |
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302 } |
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303 else if (e instanceof NullPointerException) { |
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304 // Workaround for a bug in the Socket class that sometimes |
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305 // causes a NullPointerException on a closed socket. |
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306 return CheckedSocketException.create(e, mSocket, "Socket closed"); |
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307 } |
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308 else { |
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309 return CheckedSocketException.create(e, mSocket); |
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310 } |
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311 } |
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312 |
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313 /** |
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314 * @param e Should be instance of SocketException or RuntimeException. |
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315 */ |
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316 SocketException handleSocketException(Exception e) { |
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317 int count; |
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318 synchronized (this) { |
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319 count = ++mExceptionCount; |
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320 } |
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321 exceptionOccurred(e, count); |
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322 |
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323 if (e instanceof CheckedSocketException) { |
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324 return (CheckedSocketException)e; |
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325 } |
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326 else if (e instanceof NullPointerException) { |
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327 // Workaround for a bug in the Socket class that sometimes |
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328 // causes a NullPointerException on a closed socket. |
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329 return CheckedSocketException.create(e, mSocket, "Socket closed"); |
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330 } |
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331 else { |
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332 return CheckedSocketException.create(e, mSocket); |
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333 } |
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334 } |
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335 |
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336 private synchronized void exceptionOccurred(Exception e, int count) { |
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337 if (mExceptionListeners != null) { |
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338 Iterator it = mExceptionListeners.iterator(); |
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339 while (it.hasNext()) { |
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340 ((ExceptionListener)it.next()) |
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341 .exceptionOccurred(this, e, count); |
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342 } |
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343 } |
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344 } |
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345 |
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346 public static interface ExceptionListener { |
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347 /** |
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348 * @param count new exception count, which will be one the first time |
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349 * this method is called. |
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350 */ |
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351 public void exceptionOccurred(CheckedSocket s, Exception e, int count); |
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352 } |
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353 |
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354 private class Input extends InputStream { |
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355 private final InputStream mStream; |
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356 |
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357 public Input(InputStream in) { |
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358 mStream = in; |
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359 } |
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360 |
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361 public int read() throws IOException { |
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362 try { |
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363 return mStream.read(); |
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364 } |
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365 catch (IOException e) { |
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366 throw handleIOException(e); |
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367 } |
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368 } |
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369 |
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370 public int read(byte[] b) throws IOException { |
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371 try { |
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372 return mStream.read(b); |
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373 } |
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374 catch (IOException e) { |
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375 throw handleIOException(e); |
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376 } |
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377 } |
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378 |
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379 public int read(byte[] b, int off, int len) throws IOException { |
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380 try { |
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381 return mStream.read(b, off, len); |
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382 } |
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383 catch (IOException e) { |
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384 throw handleIOException(e); |
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385 } |
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386 } |
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387 |
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388 public long skip(long n) throws IOException { |
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389 try { |
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390 return mStream.skip(n); |
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391 } |
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392 catch (IOException e) { |
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393 throw handleIOException(e); |
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394 } |
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395 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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396 |
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397 public int available() throws IOException { |
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398 try { |
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399 return mStream.available(); |
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400 } |
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401 catch (IOException e) { |
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402 throw handleIOException(e); |
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403 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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404 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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405 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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406 public void close() throws IOException { |
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407 try { |
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408 mStream.close(); |
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409 } |
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410 catch (IOException e) { |
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411 throw handleIOException(e); |
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412 } |
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413 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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414 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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415 public void mark(int readlimit) { |
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416 mStream.mark(readlimit); |
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417 } |
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418 |
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419 public void reset() throws IOException { |
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420 try { |
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421 mStream.reset(); |
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422 } |
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423 catch (IOException e) { |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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424 throw handleIOException(e); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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425 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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426 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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427 |
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428 public boolean markSupported() { |
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429 return mStream.markSupported(); |
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430 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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431 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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432 |
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433 private class Output extends OutputStream { |
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434 private final OutputStream mStream; |
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435 |
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436 public Output(OutputStream out) { |
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437 mStream = out; |
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438 } |
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439 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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440 public void write(int b) throws IOException { |
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441 try { |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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442 mStream.write(b); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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443 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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444 catch (IOException e) { |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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445 throw handleIOException(e); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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446 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
447 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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448 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
449 public void write(byte[] b) throws IOException { |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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450 try { |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
451 mStream.write(b); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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452 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
453 catch (IOException e) { |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
454 throw handleIOException(e); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
455 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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456 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
457 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
458 public void write(byte[] b, int off, int len) throws IOException { |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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459 try { |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
460 mStream.write(b, off, len); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
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461 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
462 catch (IOException e) { |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
463 throw handleIOException(e); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
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464 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
465 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
466 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
467 public void flush() throws IOException { |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
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468 try { |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
469 mStream.flush(); |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
470 } |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
471 catch (IOException e) { |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
472 throw handleIOException(e); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
473 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
474 } |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
475 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
476 public void close() throws IOException { |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
477 try { |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
478 mStream.close(); |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
479 } |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
480 catch (IOException e) { |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
481 throw handleIOException(e); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
482 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
483 } |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
484 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
485 } |